Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 38: Two Medium (DiffLev 6-7) Outsparkling Puzzles (numbers 155-156)
- Step-by-step instructions for solving Puzzle 155, (71/144) Diff: 6/99.9991
- Step-by-step instructions for solving Puzzle 156, (79/144) Diff: 7/999.9982